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- 0.01 mol of solid NaOH was added to a 500 mL solution containing 0.55 M C6H5CH2COOH and 0.75 MC6H5CH2COON (Ka for C6H,CH2COOH = 4.9 x 10-5). Drag and drop the appropriate choices from below to fill the following table and answer the questions. Reaction Table (aq) + OH (ag) + H20 (1) (aq) Initial Changes Final What is the pH of this solution? pH = 8.65 0.02 0.5 0.53 10.32 0.51 0.03 0.73 0.01 0.2 0.75 -0.03 No -0.01 4.47 0.3 +0.01 0.57 +0.03 -0.02 9.85 +0.02 Yes 0.55 C6H5CH2COOH 0.4 0.45 0.1 C6H5CH2CO0- 3.65 3.22 0.77Ksp = 6.7 x 10-³1 for Cr(OH)3 at 25 °C, what is the molar concentration of Cr³+ at 25 °C? M (example: type in 3.4E-5 for 3.4x10-5). Please pay attention to the number of sig. figs. in your answer. The molar concentration of OH isHexanoic acid was added to an immiscible biphasic solvent sysem, water and CCl4 at 20.0OC and the equilibrium concentrations of hexanoic acid were determined to be 3.66 g/L in H2O and 67.0 g/L in CCl4. Caluclate the distrubution coeffiecent (D1) of hexanoic acid in CCl4 with respect to water.
- The solubility of suberic acid C6H12(COOH)2 is 0.14 g/100 ml H2O and 0.56g/100 ml ethyl ether at 15 0C. Calculate the weight of suberic acid removed from 50 ml aqueous solution containing 40 mg acid by extraction with 50 ml ether. Calculate the weight of acid that would be removed by two successive 25 ml extraction with ether.Calculate the values for log Kow and the saturated aqueous solubility (Cw$sat) for bisphenol A. The value for log Kow is 3.62 ; enter your answer as X.XX The value for Cwsat is ; report your answer in units of moles/liter and enter it as X.XX×10(-X). Bisphenol A is closest to "phthalates" H3C CH3 HO HO,1. A sample of an infusion was diluted 10 ml to 250 ml and then 10 ml to 200 ml. It was then analysed and was found to contain sodium at 0.789 mg/100 ml. Calculate the concentration of sodium in the original sample in %w/v. The sample was composed of a mixture of sodium lactate and sodium carbonate in equimolar amounts. Calculate the amount of sodium lactate and sodium carbonate in mg/10 ml of the sample (Na = 23, lactate = 89, carbonate = 60) 2. 0.641 g of a semi-synthetic alkaloid was dissolved in 25 ml of 1% w/v acetic acid and was analysed directly by HPLC. The solution was found to contain 1.42 mg/100 ml of an impurity. What is the level of impurity in % w/w and ppm? 3. Calculate the pH of a buffer system made by dissolving 1.2 g of acetic acid and 0.82 g of sodium acetate in 500 ml of distilled water (pKa of acetic acid = 4.7) 4. Convert the following concentrations into the required expression. Concentration given Expression required 0.5% NaCl molarity 1 mM of KBr…
- A sample of an infusion was diluted 10 ml to 250 ml and then 10 ml to 200 ml. It was thenanalysed and was found to contain sodium at 0.789 mg/100 ml. Calculate the concentrationof sodium in the original sample in %w/v. The sample was composed of a mixture of sodiumlactate and sodium carbonate in equimolar amounts. Calculate the amount of sodiumlactate and sodium carbonate in mg/10 ml of the sample (Na = 23, lactate = 89, carbonate =60)Ksp = 1.3 x 10-32 for Ca3(PO4)2 at 25 °C, what is the molar concentration of Ca²+ at 25 °C? M (example: type in 3.4E-5 for 3.4x10-5). Please pay attention to the number of sig. figs. in your answer. The molar concentration of PO4³- isDerive a general expression that shows pH dependence of the distributioncoefficient defined in (2-20) for a weak acid between a fermentation broth and an organic solvent.
- Consider the reaction of 75.0 mL of 0.350 M C5H5N (Kb = 1.7 x 107⁹) with 100.0 mL of 0.425 M HCI. Write the net ionic equation for the reaction that takes place. Be sure to include the proper phases for all species within the reaction. 1 U 1 + 4- 2 0₂ H₂O Reset 0 3 □ H 2 4 → C 0 5 6 H3O+ + 6 (s) H* ²+ AWW 4 7 8 7 (1) OH 8 • x H₂O 4+ 9 0 N (g) (aq) 0 DeleteWhat is the minimum distribution constant that permits removal of 99% of a solute from 50.0 mL of water with two 25.0-mL extractions with toluene? five 10.0-mL extractions with toluene?15 g of unknown organic sample was dissolve in 575 mL of Dicloromethane (DCM). The boiling point of benzene was increased by 3.40oC. Determine the molecular weight of the unknown sample? Kb of DCM = 2.42oC/m Bb of benzene = 39.6 oC density of benzene = 1.33 g/mL at 25 °C